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    <title>colcompr</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>colcompr</b> -  column compression of polynomial matrix</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt>[Y,rk,ac]=colcompr(A);  </tt>
      </dd>
    </dl>
    <h3>
      <font color="blue">Parameters</font>
    </h3>
    <ul>
      <li>
        <tt>
          <b>A</b>
        </tt>: polynomial matrix</li>
      <li>
        <tt>
          <b>Y</b>
        </tt>: square polynomial matrix (right unimodular basis)</li>
      <li>
        <tt>
          <b>rk</b>
        </tt>: normal rank of <tt>
          <b>A</b>
        </tt>
      </li>
      <li>
        <tt>
          <b>Ac</b>
        </tt>: <tt>
          <b>Ac=A*Y</b>
        </tt>, polynomial matrix</li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
    column compression of polynomial matrix <tt>
        <b>A</b>
      </tt> (compression to the left)</p>
    <h3>
      <font color="blue">Examples</font>
    </h3>
    <pre>

s=poly(0,'s');
p=[s;s*(s+1)^2;2*s^2+s^3];
[Y,rk,ac]=colcompr(p*p');
p*p'*Y
 
  </pre>
    <h3>
      <font color="blue">See Also</font>
    </h3>
    <p>
      <a href="rowcompr.htm">
        <tt>
          <b>rowcompr</b>
        </tt>
      </a>,&nbsp;&nbsp;</p>
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